(Image: apple.com)

Flickr just released its quarterly stats report, which reveals a few fun facts. Did you know that there are now 7.2 billion photos on Flickr, with users uploading 2,500 new photos a minute? Did you know that there are 228,207,499 Creative Commons-licensed photos on Flickr?

Most interesting, though, were the stats about camera choices among Flickr's community. The most popular camera is the iPhone 4, followed by the Canon EOS 5D Mark II, followed by the iPhone 4S, followed by the Canon EOS Rebel T2I and Nikon D90.

That's a lot of play for the iPhone 4's 5-megapixel camera and the iPhone 4S's 8-megapixel camera on a site that attracts a lot of professional photographers as well as amateurs who take themselves pretty seriously.

Most popular cameras in the Flickr community over the last year.

Usage this year: iPhone 4.

Usage this year: iPhone 4S.

Usage this year: Canon EOS 5D Mark II.

Flickr users spent the last three months shooting the solar eclipse on May 20, baseball games, and festivals—all complicated subjects. (They also shot flowers and the Golden Gate Bridge, which are better at holding still for the camera.)

Is the iPhone's quality up there with digital single-lens reflex cameras made by Nikon and Canon? Or is the iPhone's popularity with Flickr users simply because it's mobile, and the best camera is always the camera you have on you? Flickr notes that cameraphones are actually underrepresented on Flickr, which sometimes cannot automatically detect which model was used.